Saw filer



Dec 7 A1926.

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vthe above'noted defects, and lobjects offsuch inventionjare top rovideAa saw ilenwhich .i is adapted to receiveY any one `of a .pluralityVPatented Dec. "7 1 /926.

WALTERC. rasoir, or MILWAUKEE, Wisconsin.' f

saw, Finns.

f applicationalea ivovember 24, 1924. serial im 751.374.

" Thisiinventionrelates'fto sawV filers. -Y .l

In ilingsaws, `4pvarticularly circular saws, it'has'bee'n founddifficult to secure'theexact angular relation'between the cutting facesof the teeth whichis so much to be desired in this type of saw. Furtherthan thi 's`,the'

depth of cut of thefilehasjbeenan uncertain quantit'yand uniformsharpening' has heretofore been impossible."

This invention is designed to overcome of differentiV sized circularsaws",V which will Asecure the correct relative/angular" setting' ofeach of 'the cutting faces "of the saW,

. most` regularity through the device. f

which will insure a uniformv sharpening' of all of the saw teethandwhichwlll 4notfpermit the'retraction of the file -whilefinfcon'- tactwith the saw. v Further objects are to provide asaW filer vwhich mayberapidly operated Without requiring any skill on the part ofthe=operator, whichwill automatically feed .thesavvv aA tooth at a time,which will exert they same pressure on each o'f-the teeth while they'are being filed, andwhich will. insure theutsive teeth. An embodimentof the yir'nzentionisshown in the' accompanyingdrawings, in Which:-

Figurel is a 'vertcal.

main body portion lfwhi'ch is adaptedto be secured to 'a 'table topbymeans of bolts 2,

and which is provided with upstanding ends 3. j A pair ofV guiderodstextend in parallel relation between the end members "3. L A roughly,rectangularfle' carriage 5'is aperturedto receive therods 4 and isthusslidably carried upon the rods and adapted to be Lreciproca'ted 'bymeans of a hand grip or handle. This file c a`rriage'- is provided withupstanding lugs 7 vbetwer'en"which one in the sharpeningY ofsuccessectional view rivagefisprotided-'With a recess `9 `v:which housesa compression spring 1 0," the upper fend of 'such'. spring bearingAagainst the file i end of a piv ot'ed. y The cari plate 8i andurging vsuch `plate"upwardly. This file plate" is fprovided withan apertured;V

lug lljfat its .outer endv .adapted rtoreceve `atriangularf1le l12.yThffinnerfend of, the file 12`is received between alslantingyface 113.

(see Figure 5) and ayertical'face '14 formed on lugs integralwiththeileplatef8, f r'l`he 'file is'.retained[in @positionl by -means'of ,awasher 15 heldadownwardly bymeans of a screw'16, 'as' clearlyshown invFigure 5;

Means are' provided for rockingfthe le y `plate 'dewnwardlyatthecompletion of` a-v 'working' vstroke.and foryretainingfsuch file L platein its lowermost .'position during the yreturn stroke., This means maycomprise a adapted V to co'nta'ctj withv lug 18,; extending f'downwardly' froniythe thickened' portionv 19 ofatransvers'e frame20;bolted vto the basel or body portion l of the apparatus, asshown thelug 18`rides upon the cam, 17 and de.- presses the file plate 8 lintoposition,V as

spring pressed detent 2 2," such detent being pivotally carri'edbyafinember`23 bolted-to one. end of theffilecarriage 5, as show/nin l`inFigure 2.'5Thus `"when the filecarriag'ef ,isfrocked forwardly on'vitsjworlring stroke, y i

S5 i shown in Figure 1j.jj This le plate is pro# videdjwith alip ,21-which isen'gagedl by "a Figure- 11j Thisdetent isspring'pressedin? tolatching position by means ofv the spring 24.- lIt is provided with adownwardly eX'- tendngarm 25 which normally slides along the fsinoothportionv of the basel 1.4 At the 'completion of theretractionvstrokethel armv 25 rides upwardlyonfthe 'earn 26 formed jin the base' 1(see Figure' 1)` and thus. releases they outer endf off the lile'plate'8y al- Vlowing suchplate4 to spring upwardly under the inliuenceof.thespring4 10 and thus posil tioning the file co'rrectly'for thelWorking' stroke.

A .small crosshe'ad -27 formed A in the thickenedfportion 1 9'of the hasal reduced portion projecting through a slot 29in the portion 19. Thisreduced poration' is' apertured and is screw threaded and recelves theadjustlngscrew 30 suchad]ust ing screw being 4held against longitudinalmot-ion by means of a reduced lowgrehd-Bl.

is'guidedin aslotQS 10.5` upright ffraine, "as shown 'fin Figure 1, and

g f Y "Certain types .of circular saws are prowhich fits within a lowerlug 32 'formed integral withy the portion 19. This reduced portion 31 isthreaded and receives a retaining nut 33, as clearly shownj in Figure 1.

A lock nut 34 is provided for binding against the extension of thecrosshead '27' when it has been adjusted, and a knurled` up- Y per thumbnut 35 is formed on the screw 30 to facilitate its adjustment.

The crosshead 27 is providedpwith a Ythreaded aperture which receives athreaded pin 36, such threaded pin carrying a manf drel or nut37provided with a conical 'portion 38 adapted to enter the centralaperture ina circular saw, such as indicated 3 9 in Figure 1,an'd tothus center ysuch'saw. This ,m'andrelpr nut 37 is providedwith a;reduced portion 40 which is' also apertured andfsc1*ew"'threaded` to`'receive the locking vided 4with hubs and when one of this vtype isencountered', the mandrel'v is removed from the screw 36 and isreversed,fthe reduced portion 40 ittingwithin such hub,"

In order to automatically feed thesaw 39,

` 'a Ypawlj42iis provided, as shown in Figure 3, andv is provided with apointedend adapted'to engage the teeth of theV saw. This pawl is overbalanced byV a relatively "large lprojecting free'end, as shown inFigure 3, and is carried by the outer end of arock arm 43 which latteris rigidly mountedy on `a short shaft 44. The inner end ofthe shaft '44(see FigureV 2) is provided with an arm 45 which fits within a slot 46of a collar carrieldby a reciprocatory pin 47, Vsuch pinbeingguide-dwithin suitablelugs carried'by-themember 19, as shown in Fig-Vure 2. The pin i 4 7 Vhas -an extension r48 'nut 57 (see Figure 2)maybe provided upon the stem 47 and may beheld in place by lock Y nut58. kThesenuts kcooperate with the-nuts 49 and 50 to adjust the strokeof the pin or stem 47. Y

This portion 48 is adapted to be struck by the slanting cam surface 51of the file carriage 5 (see Figures 1 and 4) when such Vfile carriage iscompleting its retracting stroke. Thus when the file carriage isretracted, the projection 48 is raised and rocks the 'shaft' 44, Vandconsequently moves the pawl 42 forwardly a distance'of onetooth,

thusV advancing the saw.

' In order to prevent the saw from moving beyondv'the desired position,a frictional shoe 52 (see Figure 3) is provided and is carried byy anarm 53, such arm being held against a shouldered portion 54ofthetransverse frame. The tension of they shoe is governed; by atnu't- 5.5lscrewed upon a projecting pin 56.A as shown in Figure 3.

As may be seen from Figure 6, means are provided for limiting the upwardstroke of the le plate 8.' AThis means may comprise a `lug 5 9 whichfits within a recess provi-ded'belo'w themembe'r 51, 'as clearly shownin Figure 6, and thus limits the upward motion of the file plate. MeansVare also provided for preventing lateral [swing of the vfile plate atits free end. This means may comprise a'pair ofpg'uides 60, as shown inFigure `6,j`whicli are .integral with the iile plate'8 and kslide'between side portions ofthe file carriage It' ill thus' befseen that asaw filer has been provided' which will, insure the correct angularrelationfoffthe"cutting faces ofthe saw teeth, which will exert the samepres'- sure upon theile Vat each stroke, which will withdraw thefile7from thework duringretraction, and which'may bev rapidly operated by anunskilled person and willafcc'urately'produce lthe desired results.

Although the invention has been described in considerable detail, it isto vbe"unfderstood that the invention may be Vvariously embodied Yandis,'therefore,' to be limited only as claimed.

l claim .1. Af filerV for circular Vsaws comprising a base havingguidesthereon, aY transyerse Saw Supporting iframe @armed by .Sad'ba'seYandv adapted' to receive'V 'a circular saw, a.

fil@ Carriage, Sldably mounted leon Sad guides, a fileV plate AYpivoted'to said carriage and' yeldliely lifeedlupwr-d1yfcam .mme

for depressing said file plate at the ycomple-V tion of the wqrk stroke,a latch for locking said plate in depressedposition, andineans fortripping said latch at th'ecompletion yof the retraction stroke.

2. A filer for circular saws comprising a base having guides thereon, latransverse saw supporting frame carried by said' 'base and adapted toreceive a circular saw, a file carriage slidably mounted upon saidguides,

a file yplate pivotedto'said carriage and yieldingly urged upwardly, cammeans for depressing said hle plate at thecompletion of the work stroke,a latch for lockingsaid plate in depressedpo'sition, means for trip` Yping said latch atfthe completion yof the retraction stroke, and meansfor advancing said saw one tooth'at a time after each cycle ofoperations ofsaid carriage.

3. filerfor circularp'saws comprising a base having guides thereon', atransverse saw supporting a frame carried by the base and Vadapted'toreceive aci'rcular saw, a file carflag@ Sldably `I'Ilnlltoid liponsaidguides, a 139 file plate pivoted at one end to saicl 'ile oary rage'fandhaving its other end yielclingly urged upwardly, a4 stationary member.cari` Y recl by saidtransverse frame, a cam mem! ber carried by saidleplate and contacting with said stationary member during the last`portion'of the working structure of said file to depress said fileplate, a latch for temat the completion of the return stroke. 1 Intestimony that Ifclaim the foregoing 'I have hereunto set my hand atMilwaukee,

inthe county of Milwaukee aud State of4` Wisconsin'.

WALTERv o. TESGH

